Yawning when you're tired is like pressing the refresh button on your brain. When you yawn, more oxygen goes into your body and more carbon dioxide comes out, it helps your brain wake up or get ready for sleep. It's also contagious! If someone else yawns nearby, you might feel the urge to do the same.
Examples
- Your dog yawns when it's lying down on the couch after a long day of running around.
- You're at school and feel sleepy after lunch; you yawn, and your friend does too.
- You watch a movie late at night, and suddenly start yawning, even though you’re not tired.
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See also
- Why Do We Yawn When We’re Tired or Bored?
- Why Do Humans Yawn When They’re Tired?
- Why Do People Yawn When They’re Tired?
- What Causes People to Yawn When They’re Tired?
- Why Do We Yawn When Tired?
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